US5191156A - Drill string enclosure - Google Patents

Drill string enclosure Download PDF

Info

Publication number
US5191156A
US5191156A US07/868,143 US86814392A US5191156A US 5191156 A US5191156 A US 5191156A US 86814392 A US86814392 A US 86814392A US 5191156 A US5191156 A US 5191156A
Authority
US
United States
Prior art keywords
drill string
enclosure
recited
drill
contaminates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/868,143
Inventor
Douglas K. Jorgensen
Douglass J. Kuhns
Otto Wiersholm
Timothy A. Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Department of Energy
Original Assignee
US Department of Energy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Department of Energy filed Critical US Department of Energy
Priority to US07/868,143 priority Critical patent/US5191156A/en
Application granted granted Critical
Publication of US5191156A publication Critical patent/US5191156A/en
Priority to CA002093062A priority patent/CA2093062A1/en
Priority to JP5086157A priority patent/JPH0617588A/en
Assigned to UNITED STATES OF AMERICA, THE, AS REPRESENTED BY THE DEPARTMENT OF ENERGY reassignment UNITED STATES OF AMERICA, THE, AS REPRESENTED BY THE DEPARTMENT OF ENERGY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MILLER, TIMOTHY A., WIERSHOLM, OTTO, KUHNS, DOUGLASS J., JORGENSEN, DOUGLAS K.
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/07—Arrangements for treating drilling fluids outside the borehole for treating dust-laden gaseous fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes

Definitions

  • This invention relates to a drill string enclosure which is required to prevent release of contaminates and allows maximum visibility for the workers during drilling and sampling of hazardous waste sites.
  • the drill string enclosure consists of six component parts a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts.
  • the primary means for the control of airborne contaminate particles of plutonium and americium was the control of the moisture content of the soil in and around the dig site.
  • the addition of moisture to the surface soil of a dig is a well known method of dust control used by many industries.
  • effective monitoring and control of the airborne particles by moisture addition alone cannot, as a sole means of containment, meet the stringent requirements imposed by the federal and state governments for hazardous waste sites.
  • coverings and air locks which reduce the amounts of contaminates released are more costly and hinder the visibility of the workers during drilling operations.
  • the present invention presents a novel enclosure which allows for maximum visibility of the drill site with a minimum release of contaminates into the atmosphere.
  • the drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts.
  • the upper acrylic cylinder is optional based upon the drill string length.
  • the drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site. When drilling at a particular level is finished a new drill string can be added with a minimum amount of exposure to contaminates.
  • the string is introduced through a port in the drill string guide.
  • the port has a bag attached by a clamp. This allows the string to be inserted through the port and contact with the atmosphere to be cut off.
  • a vacuum hose attached to the lower acrylic cylinder helps to reduce the amount of airborne contaminates that may escape when inserting the drill string in the port.
  • the lexan or acrylic sight cylinders allow the string to be guided securely into place. When the new drill string is in place the drilling may continue at the new level.
  • the invention may comprise a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts.
  • FIG. 1 shows an embodiment of the invention
  • FIG. 2 shows an exploded view of some of the major components of the invention
  • FIG. 3 shows a detailed crossectional view of the upper retainer ring
  • FIG. 4 shows another embodiment of the invention.
  • FIG. 5 shows a detailed crossectional view of the lower retaining ring.
  • the drill string enclosure 1 comprises a top bracket 2, connected to an upper acrylic cylinder 3.
  • the drill casing guide 4 is attached to either the upper acrylic cylinder 3 or the top bracket 2 if the upper acrylic cylinder is not in use.
  • a lower acrylic cylinder 5 connects to a bottom bracket 6 on one end, and the other end- is attached to the drill casing guide 4.
  • the top bracket 2 is comprised of carbon steel or other comparable industrial grade steel.
  • the bracket 2 is slipped over the drill steel 7 and bolted to the sonic drive head 8 on the drill rig using six bolts 10 on the three flared ends 9 of the bracket 2.
  • the base 15 of the top bracket 2 is fitted with a cylindrical aluminum retainer 11. As shown in FIG. 3, the aluminum retainer 11 holds an air seal 12 and an O-Ring 13. The air seal 12 and O-Ring 13 are held in place using machined grooves 14 for each component.
  • the air seal 12 is further secured with a silicone sealant.
  • the retainer 11 is held in the top bracket base 15 with bolts 16 and silicon sealer.
  • the air seal 12 is inflated by means of an air hose 17 that runs through the steel and aluminum retainer 11.
  • Attached to the base 15 of the top bracket 2 is flexible ducting 18.
  • the flexible ducting is attached to the bracket 2 by a hose clamp 19.
  • the other end of the flexible ducting 18 is attached to the acrylic drill casing guide 4.
  • the upper acrylic cylinder 3 connects to the ducting 18 and is attached to it at the top bracket 2 and another ducting section 20 attaches to the opposite end of the cylinder 3 and extends up to the casing guide 4.
  • FIG. 4 shows, the acrylic drill casing guide 4 having two acrylic ports 21 and 22 attached to a main cylinder 23 via a strong epoxy glue. The ends of the ports 21 and 22 are grooved in two places for ease in attachment of a sample bag 24 using a slip tie.
  • the base of the casing guide 25 is again attached to flexible ducting 26 with a hose clamp 27, this ducting is attached to the lower acrylic viewing cylinder 5, and another section of ducting 29 is attached to the base 28 of the lower cylinder 5, thus completing the system.
  • a hole 30 has been machined into the lower acrylic cylinder 5 in which a hose 31 is attached leading to a HEPA vacuum 32.
  • the vacuum 32 produces a negative pressure inside the enclosure to further ensure containment of airborne contaminants.
  • the last section of ducting 29 is attached to the bottom bracket 6 with a standard hose clamp 33.
  • the bracket 6 is carbon steel or other suitable material and is bolted to the drill rig above the breakout jaws.
  • Inside the bottom bracket 6 is an aluminum retainer 35. As shown in FIG. 5, contained in the retainer 35 are two brush seals 36, 37, and another air seal 38. The attachment of the retainer 35 to the bottom bracket 6 is identical to the base of the top bracket 2.
  • Brush seals 36, 37, and air seal 38 are also held in place using grooves 34 machined into the aluminum retainer 35.
  • the air seal 38 is further secured in place using a silicone sealant.
  • Adjustable chains are attached from the top bracket 2 to bolts mounted in the acrylic casing guide 4. Three chains move the entire enclosure vertically and hold the enclosure in place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Soil Sciences (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.

Description

CONTRACTUAL ORIGIN OF THE INVENTION
The United States Government has rights in this invention pursuant to Contract No. DE-AC07-76ID01570 between the United States Department or Energy and EG&G Idaho,INC.
BACKGROUND OF THE INVENTION
Between 1950 and 1970 the Department of Energy's Rocky Flats Plant generated contaminated waste, which was buried at the Idaho National Engineering Laboratory. This waste must now be retrieved and sent to a permanent disposal site. During retrieval the main contaminates to be controlled are compounds of plutonium and americium, and other volatile organic and inorganic substances. Since these substances are small sized, and extremely mobile, airborne concentrations must be kept to a minimum to effectively eliminate personnel uptake during retrieval operations. This invention relates to a drill string enclosure which is required to prevent release of contaminates and allows maximum visibility for the workers during drilling and sampling of hazardous waste sites. The drill string enclosure consists of six component parts a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts.
Prior to the development of the drill string enclosure, the primary means for the control of airborne contaminate particles of plutonium and americium was the control of the moisture content of the soil in and around the dig site. The addition of moisture to the surface soil of a dig is a well known method of dust control used by many industries. However, effective monitoring and control of the airborne particles by moisture addition alone cannot, as a sole means of containment, meet the stringent requirements imposed by the federal and state governments for hazardous waste sites. Additionally, coverings and air locks which reduce the amounts of contaminates released are more costly and hinder the visibility of the workers during drilling operations. The present invention presents a novel enclosure which allows for maximum visibility of the drill site with a minimum release of contaminates into the atmosphere.
SUMMARY OF THE INVENTION
The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site. When drilling at a particular level is finished a new drill string can be added with a minimum amount of exposure to contaminates. The string is introduced through a port in the drill string guide. The port has a bag attached by a clamp. This allows the string to be inserted through the port and contact with the atmosphere to be cut off. A vacuum hose attached to the lower acrylic cylinder helps to reduce the amount of airborne contaminates that may escape when inserting the drill string in the port. The lexan or acrylic sight cylinders allow the string to be guided securely into place. When the new drill string is in place the drilling may continue at the new level.
It is an object of the invention to provide an effective contaminate containment system for drilling hazardous waste sites.
It is another object of this invention to provide an inexpensive means to contain contaminants, during drilling, while allowing optimum visibility of the drill site.
Additional objects, advantages and novel features of the invention will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
To achieve the foregoing and other objects and in accordance with the purpose of the present invention, as embodied and broadly described herein, the invention may comprise a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are incorporated in and form part of the specification, illustrate an embodiment of the present invention and together with the description, serve to explain the principles of the invention. In the drawings:
FIG. 1 shows an embodiment of the invention;
FIG. 2 shows an exploded view of some of the major components of the invention;
FIG. 3 shows a detailed crossectional view of the upper retainer ring;
FIG. 4 shows another embodiment of the invention; and
FIG. 5 shows a detailed crossectional view of the lower retaining ring.
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 and 2, the drill string enclosure 1 comprises a top bracket 2, connected to an upper acrylic cylinder 3. The drill casing guide 4 is attached to either the upper acrylic cylinder 3 or the top bracket 2 if the upper acrylic cylinder is not in use. A lower acrylic cylinder 5 connects to a bottom bracket 6 on one end, and the other end- is attached to the drill casing guide 4.
In a preferred embodiment of the invention, the top bracket 2 is comprised of carbon steel or other comparable industrial grade steel. The bracket 2 is slipped over the drill steel 7 and bolted to the sonic drive head 8 on the drill rig using six bolts 10 on the three flared ends 9 of the bracket 2. The base 15 of the top bracket 2 is fitted with a cylindrical aluminum retainer 11. As shown in FIG. 3, the aluminum retainer 11 holds an air seal 12 and an O-Ring 13. The air seal 12 and O-Ring 13 are held in place using machined grooves 14 for each component. The air seal 12 is further secured with a silicone sealant. The retainer 11 is held in the top bracket base 15 with bolts 16 and silicon sealer. The air seal 12 is inflated by means of an air hose 17 that runs through the steel and aluminum retainer 11. Attached to the base 15 of the top bracket 2 is flexible ducting 18. The flexible ducting is attached to the bracket 2 by a hose clamp 19. The other end of the flexible ducting 18 is attached to the acrylic drill casing guide 4.
The upper acrylic cylinder 3 connects to the ducting 18 and is attached to it at the top bracket 2 and another ducting section 20 attaches to the opposite end of the cylinder 3 and extends up to the casing guide 4. FIG. 4 shows, the acrylic drill casing guide 4 having two acrylic ports 21 and 22 attached to a main cylinder 23 via a strong epoxy glue. The ends of the ports 21 and 22 are grooved in two places for ease in attachment of a sample bag 24 using a slip tie. The base of the casing guide 25 is again attached to flexible ducting 26 with a hose clamp 27, this ducting is attached to the lower acrylic viewing cylinder 5, and another section of ducting 29 is attached to the base 28 of the lower cylinder 5, thus completing the system.
A hole 30 has been machined into the lower acrylic cylinder 5 in which a hose 31 is attached leading to a HEPA vacuum 32. The vacuum 32 produces a negative pressure inside the enclosure to further ensure containment of airborne contaminants. The last section of ducting 29 is attached to the bottom bracket 6 with a standard hose clamp 33. The bracket 6 is carbon steel or other suitable material and is bolted to the drill rig above the breakout jaws. Inside the bottom bracket 6 is an aluminum retainer 35. As shown in FIG. 5, contained in the retainer 35 are two brush seals 36, 37, and another air seal 38. The attachment of the retainer 35 to the bottom bracket 6 is identical to the base of the top bracket 2. Brush seals 36, 37, and air seal 38 are also held in place using grooves 34 machined into the aluminum retainer 35. The air seal 38 is further secured in place using a silicone sealant. Adjustable chains are attached from the top bracket 2 to bolts mounted in the acrylic casing guide 4. Three chains move the entire enclosure vertically and hold the enclosure in place.
The foregoing description of the preferred embodiment of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching.

Claims (11)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A drill string enclosure comprising:
a top bracket having an upper and lower end;
a first flexible cylinder member connected at one end to said lower end of said top bracket;
means for guiding drill casings attached to said other end of said first flexible cylinder member;
a second flexible cylinder member connected at one end to said means for guiding drill casings;
a lower cylinder member attached to the other end of said second flexible cylinder member;
a third flexible cylinder member connected at one end to said lower cylinder member; and
a bottom bracket attached to the other end of said third flexible cylinder member.
2. A drill string enclosure as recited in claim 1 wherein said top bracket further comprising:
a top section, said top section including means for connecting said top bracket to a drill rig, and wherein said means includes three flared ends;
a cylindrical mid-section; and
a bottom base section, said bottom base section including a retainer ring.
3. A drill string enclosure as recited in claim 2, wherein said retainer ring comprises:
means for sealing contaminates within said drill string enclosure preventing release of said contaminates into the atmosphere.
4. A drill string enclosure as recited in claim 3, wherein said bottom bracket comprises:
a retainer ring, said retainer ring including means for sealing contaminates within said drill string enclosure preventing release of said contaminates into the atmosphere.
5. A drill string enclosure as recited in claim 4, wherein said means for guiding drill casing comprises:
a hollow cylindrical member, including at least one port for introducing additional drill string members into said drill string enclosure while allowing a minimum release of contaminates into the atmosphere.
6. A drill string enclosure as recited in claim 5, wherein said means for sealing contaminates in said top bracket comprises:
a hollow aluminum ring, having a first and second groove etched around the inner periphery of said hollow aluminum ring;
an air seal seated in said first groove; and an o-ring seated in said second groove.
7. A drill string enclosure as recited in claim 6, wherein said means for sealing contaminates in said bottom bracket comprises:
a hollow aluminum ring, having a first and second groove etched around the inner periphery of said hollow aluminum ring;
an air seal; and
two brush seals seated within said first and second grooves of said hollow aluminum ring.
8. A drill string enclosure as recited in claim 7, wherein said lower cylindrical cylinder includes a means for providing a negative pressure differential within said drill string enclosure.
9. A drill string enclosure as recited in claim 8, wherein said three flared ends and mid-section are comprised of carbon steel.
10. A drill string enclosure as recited in claim 8, wherein said upper cylindrical cylinder, lower cylindrical cylinder, and means for guiding drill casing is comprised of an acrylic.
11. A drill string enclosure as recited in claim 8, wherein said lower cylindrical cylinder includes a means for providing a negative pressure differential comprises a vacuum, having the ability to remove small airborne contaminates within said drill string enclosure.
US07/868,143 1992-04-14 1992-04-14 Drill string enclosure Expired - Fee Related US5191156A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US07/868,143 US5191156A (en) 1992-04-14 1992-04-14 Drill string enclosure
CA002093062A CA2093062A1 (en) 1992-04-14 1993-03-31 Drill string enclosure
JP5086157A JPH0617588A (en) 1992-04-14 1993-04-13 Enclosure of drill string

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/868,143 US5191156A (en) 1992-04-14 1992-04-14 Drill string enclosure

Publications (1)

Publication Number Publication Date
US5191156A true US5191156A (en) 1993-03-02

Family

ID=25351144

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/868,143 Expired - Fee Related US5191156A (en) 1992-04-14 1992-04-14 Drill string enclosure

Country Status (3)

Country Link
US (1) US5191156A (en)
JP (1) JPH0617588A (en)
CA (1) CA2093062A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792896A (en) * 1992-12-11 1998-08-11 Phillips Petroleum Company Isoparaffin-olefin alkylation
US5807230A (en) * 1996-05-10 1998-09-15 Argenta; Louis Multi-purpose waste disposal system
US5863283A (en) * 1997-02-10 1999-01-26 Gardes; Robert System and process for disposing of nuclear and other hazardous wastes in boreholes
US20040076481A1 (en) * 2002-10-22 2004-04-22 Jessmore James J. Subterranean drilling and in situ treatment of wastes using a contamination control system and methods relating thereto

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US216970A (en) * 1879-07-01 Improvement in guide-piles
US510264A (en) * 1893-12-05 Bridge construction
US2122517A (en) * 1937-01-02 1938-07-05 Cleveland Rock Drill Co Dust eliminator
US3922869A (en) * 1972-06-30 1975-12-02 Orb Inc Pumped evacuated tube water hammer pile driver method
US4257720A (en) * 1979-01-15 1981-03-24 Pipe Technology Systems, Inc. Apparatus and method for driving members into the ocean floor
US4444280A (en) * 1981-01-07 1984-04-24 Howeth David Franklin Drill cuttings conveying apparatus with flexible duct for improved ground clearance
US4834194A (en) * 1987-11-13 1989-05-30 Manchak Frank Method and apparatus for detection of volatile soil contaminants in situ
US5127765A (en) * 1991-07-25 1992-07-07 Millgard Environmental Corporation System for in-situ treatment of underwater contaminated material

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US216970A (en) * 1879-07-01 Improvement in guide-piles
US510264A (en) * 1893-12-05 Bridge construction
US2122517A (en) * 1937-01-02 1938-07-05 Cleveland Rock Drill Co Dust eliminator
US3922869A (en) * 1972-06-30 1975-12-02 Orb Inc Pumped evacuated tube water hammer pile driver method
US4257720A (en) * 1979-01-15 1981-03-24 Pipe Technology Systems, Inc. Apparatus and method for driving members into the ocean floor
US4444280A (en) * 1981-01-07 1984-04-24 Howeth David Franklin Drill cuttings conveying apparatus with flexible duct for improved ground clearance
US4834194A (en) * 1987-11-13 1989-05-30 Manchak Frank Method and apparatus for detection of volatile soil contaminants in situ
US4834194C1 (en) * 1987-11-13 2002-09-03 Manchak Frank Method and apparatus for detection of volatile soil contaminants in situ
US5127765A (en) * 1991-07-25 1992-07-07 Millgard Environmental Corporation System for in-situ treatment of underwater contaminated material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792896A (en) * 1992-12-11 1998-08-11 Phillips Petroleum Company Isoparaffin-olefin alkylation
US5807230A (en) * 1996-05-10 1998-09-15 Argenta; Louis Multi-purpose waste disposal system
US5863283A (en) * 1997-02-10 1999-01-26 Gardes; Robert System and process for disposing of nuclear and other hazardous wastes in boreholes
US20040076481A1 (en) * 2002-10-22 2004-04-22 Jessmore James J. Subterranean drilling and in situ treatment of wastes using a contamination control system and methods relating thereto
US6796746B2 (en) * 2002-10-22 2004-09-28 Bachtel Bwxt Idaho, Llc Subterranean drilling and in situ treatment of wastes using a contamination control system and methods relating thereto

Also Published As

Publication number Publication date
CA2093062A1 (en) 1993-10-15
JPH0617588A (en) 1994-01-25

Similar Documents

Publication Publication Date Title
US4842448A (en) Method of removing contaminants from contaminated soil in situ
US7311011B2 (en) Apparatuses for interaction with a subterranean formation, and methods of use thereof
US5010957A (en) Environmental monitoring well housing and protection method
JPH02501582A (en) Packing seal for borehole
US5191156A (en) Drill string enclosure
DE69434797D1 (en) DEVICE AND METHOD FOR CONTROLLING IMPLEMENTATION OF PRESSURE CYLINDERS
Wilson et al. In situ pore-liquid sampling in the vadose zone
US6264055B1 (en) Containment canister for capturing hazardous waste debris during piping modifications
US6938503B2 (en) Lysimeter apparatus
US5201345A (en) Inflatable containment diaphragm for sealing and removing stacks
US6796746B2 (en) Subterranean drilling and in situ treatment of wastes using a contamination control system and methods relating thereto
SE9001228L (en) Rock drilling equipment
EP0307615A3 (en) Device for the non-destructive detection of damaged bridges, reservoir and flat-roof sealings
JP3002966B2 (en) Hermetic adapter and its replacement method
ATE148930T1 (en) EXCAVATION DEVICE AND METHOD FOR CONTROLLING THE ADVANCE SPEED OF A DIGGING TOOL OF THE EXCAVATION DEVICE
Jorgensen et al. Drill string enclosure
EP0471363A3 (en) Apparatus and method for the disposal of health-endangering gases, vapours, dusts and fumes by adsorption to surfactant substances
Collins et al. Ground-water contamination: field methods: a symposium
JP2997058B2 (en) Soil and gas sampling equipment
JP3869384B2 (en) Sampling aid
Phelps Drilling Graphite Samples from Irradiated SRE Moderator Elements
COSTELLO et al. Protecting workers who clean up hazardous waste sites
GB2157061A (en) Radioactive material handling equipment
Westmoreland Swoosh! New system vacuums up drill cuttings
JP3212519U (en) Disposable glove box

Legal Events

Date Code Title Description
AS Assignment

Owner name: UNITED STATES OF AMERICA, THE, AS REPRESENTED BY T

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JORGENSEN, DOUGLAS K.;KUHNS, DOUGLASS J.;WIERSHOLM, OTTO;AND OTHERS;REEL/FRAME:006698/0488;SIGNING DATES FROM 19920313 TO 19920325

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20010302

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362